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8 HitsProducts 184 HitsCOMSOL Blog 1359 HitsApplication Gallery 32 HitsUser Story Gallery 0 HitsVideo Gallery 3 HitsKnowledge Base 2679 HitsTechnical Papers and Presentations 1 HitsCertified Consultants 9 HitsMultiphysics Cyclopedia 0 HitsEvent Calendar 0 HitsCareers 4 HitsLearning Center
COMSOL Multiphysics usually uses an interpolation function with a local table to define the B-H curve. You can also plug in your own B-H curves by adding the B-H Curve material property to a new magnetic material.
How the Extrapolation of the B-H Curve Affects the Simulation
In the Settings window of the B-H Curve interpolation function, you can click the Plot button to visualize the B-H curve.
COMSOL Blog -
www.comsol.com/blogs/how-the-b-h-curve-affects-a-magnetic-analysis-and ...
Instantaneous Norm Variables for Vector Quantities There are new variables that can be added to the form phys.normXi = sqrt(real(Xx)^2+real(Xy)^2+real(Xz)^2), where phys is a placeholder for any physics tag, such as ewfd, and X is a placeholder for a physical quantity, such as an electric field (E), magnetic field (H), etc. These variables are especially useful when visualizing time-harmonic vector waves.
Products -
www.comsol.com/release/6.2/rf-module
Instantaneous Norm Variables for Vector Quantities There are new variables that can be added to the form phys.normXi = sqrt(real(Xx)^2+real(Xy)^2+real(Xz)^2), where phys is a placeholder for any physics tag, such as ewfd, and X is a placeholder for a physical quantity, such as an electric field (E), magnetic field (H), etc. These variables are especially useful when visualizing time-harmonic vector waves.
Products -
www.comsol.com/release/6.2/wave-optics-module
It was part of a graduate course in which the assignment consisted of evaluating the potential of patents in the field of microfluidics through mathematical modeling.
The model treats an H-micro cell for separation through diffusion.
Application Gallery -
www.comsol.com/model/19
These examples show how to model a rectangular waveguide for microwaves in 2D and 3D. A single hollow waveguide can conduct two kinds of electromagnetic waves: transversal magnetic (TM) or transversal electric (TE) waves.
The models examine a TE wave that has no electric field component in the direction of propagation.
Application Gallery -
www.comsol.com/model/1421
The app can be used to verify and optimize B-H curves using experimental data. It also generates curve data in the over-fluxed region, where measurement are difficult to perform. It removes the unphysical ripples of the slope of the B-H curve that might cause numerical instability.
The original B-H curve is evaluated from two aspects.
Application Gallery -
www.comsol.com/model/71651
A model comparing the magnetization material models in time-dependent and frequency domain studies. Effective B-H curves are used for frequency domain.
Application Gallery -
www.comsol.com/model/33981
Thus, the field problem is described by a coupled A-H field formulation [1]. The magnetic field strength is used in the superconducting domain, whereas the remaining domains are treated with the magnetic vector potential.
[1] Bortot, Lorenzo, et al. "A Coupled A–H Formulation for Magneto-Thermal Transients in High-Temperature Superconducting Magnets."
Technical Papers and Presentations -
www.comsol.com/paper/94851
A COMSOL Multiphysics® model of our apparatus has been created in order to simulate the pressurizations of our nanoparticles by Deuterium. Using reference measurements during a cooling process, we calibrated the model so that its thermal aspects reflect the ones of our experimental set up.
To reproduce the pressurizations, the following variables are parameters : the location of the heat source and the conductivity of the nanoparticles.
Technical Papers and Presentations -
www.comsol.com/paper/15715
A Polysilicon H-beam is a micro-machined structure consisting of two primary members connected by a third member of much lower width and much greater aspect ratio.
Technical Papers and Presentations -
www.comsol.com/paper/19399
Materials based H2 storage systems for light duty vehicles need to meet challenging performance targets that have been developed by the FreedomCAR and Fuel Partnership. An alternative approach is to mix metal hydride materials with materials that enhance thermal conductivity and compact the composite material in order to obtain a H2 storage system with a low volume.
Technical Papers and Presentations -
www.comsol.com/paper/12000
Hydrogen Embrittlement (HE) is one of the mechanisms responsible for premature failure of structures. In the context of environmental sustainability, it is compelling to improve or conceive new processes and/or new materials capable of reducing fracture induced by HE. We analyzed the influence of the oxide layer on the permeability of hydrogen.
Technical Papers and Presentations -
www.comsol.com/paper/6588
You can now convert the associated B-H or H-B curve, which was previously supported only for stationary and time-dependent studies, into an effective B-H or H-B curve using the newly added Effective Nonlinear Magnetic Curves Calculator app. For a B-H curve, the first column represents H values and the second column represents B values and vice versa for an H-B curve.
COMSOL Blog -
www.comsol.com/blogs/model-magnetic-materials-in-the-frequency-domain ...
The Effective HB/BH Curve material model requires the effective Heff(B) or Beff(H) relations defined as interpolation functions. This utility app can be used to compute the interpolation data starting from the materials H(B) or B(H) relations.
The interpolation data for the H(B) or B(H) relations can be imported from a text file or entered in a table. The app then computes the interpolation data for the Heff(B) or Beff(H) relations using two different energy methods.
Application Gallery -
www.comsol.com/model/30941
Multigrid methods (MG) belong to the fastest solvers for partial differential equations. The key for this is an appropriate composition of the algorithmic components [1,2,4]. The multigrid solver implemented in COMSOL Multiphysics® is analyzed with respect to components and with respect to its numerical properties.
Technical Papers and Presentations -
www.comsol.com/paper/15414
This paper intends to show a model of a monolithic reactor for the autothermal reforming process (ATR), a process that uses hydrocarbons to produce H2. The ATR chemical reactions take place on the surface of monolith channels coated with a catalyst.
Technical Papers and Presentations -
www.comsol.com/paper/5556
The discharge properties in low pressure inductively coupled Ar/CH4 plasmas operating at an RF frequency of 13.56 MHz and total gas pressure of 20 mTorr are studied in this work. The calculation of gas flow is performed in coupling with the plasma simulation. The gas flow rate is varied from 20 to 1000 sccm.
The species taken into account include electrons, six kinds of molecules, eleven kinds of ions, five kinds of neutral radicals, and three kinds of excited species. 56 chemical reactions are considered.
Technical Papers and Presentations -
www.comsol.com/paper/11236
Ultrahigh Molecular Weight (UHMW) Polyethylene is a material commonly employed in knee and hip joint replacements. The “small punch test” is designed to assess mechanical properties using very small samples, such that because of their size they can directly be explanted. This example demonstrates the use of the Bergstrom-Bischoff material model in the Polymer Viscoplasticity feature available in the Nonlinear Structural Materials Module.
Application Gallery -
www.comsol.com/model/115381
Heat transfer in a plane shear flow configuration consisting of two infinitely long parallel plates is considered. In laminar flows over undulated substrates eddies can be generated due to the kinematical constraints. A closed form analytical solution for the velocity field, based on lubrication theory as well as a semi-analytic solution for the temperature field is derived for the creeping flow.
Technical Papers and Presentations -
www.comsol.com/paper/6657
The optical fiber communication has been popular topics besides robot study nowadays. In the process of the Dense Wave-Length Division Multiplexing (DWDM) study, the dispersion compensate for the traditional optical fiber is difficult to solve for long distance transport information. It is hard to solve this problem by experimental study on photonic crystals with high negative dispersion structure.
Technical Papers and Presentations -
www.comsol.com/paper/43493